From: "tip-bot2 for Gabriel Krisman Bertazi" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Gabriel Krisman Bertazi <krisman@collabora.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/cleanups] x86/elf: Use e_machine to choose DLINFO in compat
Date: Mon, 26 Oct 2020 12:52:36 -0000 [thread overview]
Message-ID: <160371675602.397.8513905247826263985.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20201004032536.1229030-5-krisman@collabora.com>
The following commit has been merged into the x86/cleanups branch of tip:
Commit-ID: 2656af0d5abfa26d7f1e40f92e9953fe155b950a
Gitweb: https://git.kernel.org/tip/2656af0d5abfa26d7f1e40f92e9953fe155b950a
Author: Gabriel Krisman Bertazi <krisman@collabora.com>
AuthorDate: Sat, 03 Oct 2020 23:25:30 -04:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 26 Oct 2020 13:46:46 +01:00
x86/elf: Use e_machine to choose DLINFO in compat
Since TIF_X32 is going away, avoid using it to find the ELF type on
ARCH_DLINFO.
According to SysV AMD64 ABI Draft, an AMD64 ELF object using ILP32 must
have ELFCLASS32 with (E_MACHINE == EM_X86_64), so use that ELF field to
differentiate a x32 object from a IA32 object when loading ARCH_DLINFO in
compat mode.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201004032536.1229030-5-krisman@collabora.com
---
arch/x86/include/asm/elf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index b9a5d48..9220efc 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -361,7 +361,7 @@ do { \
#define AT_SYSINFO 32
#define COMPAT_ARCH_DLINFO \
-if (test_thread_flag(TIF_X32)) \
+if (exec->e_machine == EM_X86_64) \
ARCH_DLINFO_X32; \
else \
ARCH_DLINFO_IA32
next prev parent reply other threads:[~2020-10-26 12:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-04 3:25 [PATCH v3 00/10] Reclaim TIF_IA32 and TIF_X32 Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 01/10] x86: events: Avoid TIF_IA32 when checking 64bit mode Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] perf/x86: " tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 02/10] x86: Simplify compat syscall userspace allocation Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] x86/compat: " tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 03/10] x86: oprofile: Avoid TIF_IA32 when checking 64bit mode Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] x86/oprofile: " tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 04/10] x86: elf: Use e_machine to choose DLINFO in compat Gabriel Krisman Bertazi
2020-10-26 12:52 ` tip-bot2 for Gabriel Krisman Bertazi [this message]
2020-10-04 3:25 ` [PATCH v3 05/10] elf: Expose ELF header in compat_start_thread Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] elf: Expose ELF header in compat_start_thread() tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 06/10] x86: elf: Use e_machine to select start_thread for x32 Gabriel Krisman Bertazi
2020-10-08 0:05 ` Andy Lutomirski
2020-10-26 12:52 ` [tip: x86/cleanups] x86/elf: " tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 07/10] elf: Expose ELF header on arch_setup_additional_pages Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] elf: Expose ELF header on arch_setup_additional_pages() tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 08/10] x86: elf: Use e_machine to select additional_pages between x32 Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] x86/elf: Use e_machine to check for x32/ia32 in setup_additional_pages() tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 09/10] x86: Convert mmu context ia32_compat into a proper flags field Gabriel Krisman Bertazi
2020-10-08 0:07 ` Andy Lutomirski
2020-10-26 12:52 ` [tip: x86/cleanups] x86/mm: " tip-bot2 for Gabriel Krisman Bertazi
2020-10-04 3:25 ` [PATCH v3 10/10] x86: Reclaim TIF_IA32 and TIF_X32 Gabriel Krisman Bertazi
2020-10-26 12:52 ` [tip: x86/cleanups] " tip-bot2 for Gabriel Krisman Bertazi
2020-11-05 20:01 ` [PATCH v3 10/10] " Dmitry Safonov
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